550sx wont run fuel problem?

I have a 93 550 sx with a CDK2 and it would bog and die on me. I rebuild the carb then It runs completely fine for like 10 seconds after chocking it then dies and wont restart until re choking it. I feel like it's not getting enough fuel but we checked the pulse is good, blew the lines out, bypassed the check valve, and inspected the pick up lines. It has no fuel filter. Is it possible that the petcock being very hard to turn could have something to do with it? we had this problem rebuilt the carb and still have this problem. Feel like the only possibility is it's not getting enough fuel because after choking it it will run on the fuel in the line then die again. Anyone have similar problems?
 

Crab

thanks darin...noswad!
Location
Seattle
i once had a 1992 550 reed that the clear fuel pump diaphram broke. easy check. take off the pulse hose at the cases and suck/blow on it. if it leaks, its bad.
Im betting you still might have a couple...
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